Watts F518, F1518 User Manual
Classic Series Basic Valves
ES-ACV-F518-F1518
Job Name
Job Location
Engineer
Approval
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F518 / F1518
Full Port Ductile Iron
Dual Chamber Basic Valve with
Mechanical Check Feature
The Watts ACV Models F518 and F1518 are full port, dual
chamber basic valves that incorporate a two-piece telescoping
disc and diaphragm assembly. This assembly is the only moving
part within the valve, allowing it to open or close as commanded
by the pilot control system. The lower portion of this two-piece
assembly is a mechanical check feature, which acts independent of diaphragm position or pilot control system, and provides
immediate check action when flow ceases.
When pressure is applied to the upper diaphragm chamber and
released from the lower diaphragm chamber, the valve travels
to a closed position. When pressure is applied to the lower diaphragm chamber and released from the upper diaphragm chamber the valve travels to a full open position.
Model F518: Globe Pattern Dual Chamber Basic Valve with
Mechanical Check Feature.
Model F1518: Angle Pattern Dual Chamber Basic Valve with
Mechanical Check Feature.
Contractor
Approval
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Contractor’s P.O. No.
Representative
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F518 (Globe) F1518 (Angle)
D
A
B
C
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L
M
N
K
I
J
H
E
F
G
Dimensions
Valve Size Globe
in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm lbs. kgs.
2 50 9
1
2
⁄2 65 11 279 11 279 115⁄8 295 81⁄2 216 51⁄2 140 51⁄2 140 513⁄16 148 4 102 4 102 45⁄16 1101⁄2 131⁄2 133⁄8 101⁄4 6 70 32
3 80 10
4 100 15 381 15
6 150 20 508 21 533 14 356 8
8 200 25
10 250 29
12 300 34 864 35
14 350 39 991 40
16 400 41
Standard Materials
Body & Cover: Ductile Iron ASTM A536
Coating: NSF Listed Fusion Bonded Epoxy Lined and
Trim: 316 Stainless Steel 2" – 8" (50 – 200mm)
Elastomers: Buna-N (standard)
Stem, Nut & Spring: Stainless Steel
Viton® is a registered trademark of DuPont Dow Elastomers.
Watts product specifications in U.S. customary units and metric are approximate and are provided for reference only. For precise measurements,
please contact Watts Technical Service. Watts reserves the right to change or modify product design, construction, specifications, or materials without prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold.
Globe 150# Globe 300# Cover To
Thread
A B C D E F G H I J K L M N
3
⁄8 238 93⁄8 238 10 254 63⁄8 162 4 102 4 102 41⁄4 108 4 102 4 102 41⁄4 1081⁄2 131⁄2 131⁄4 61⁄4 6 40 18
1
⁄2 267 12 305 131⁄4 337 83⁄4 222 51⁄4 133 53⁄4 146 61⁄8 156 51⁄4 133 53⁄4 146 61⁄8 1561⁄2 131⁄2 133⁄8 101⁄4 6 105 48
3
⁄8 645 263⁄8 670 191⁄2 495 11 279 111⁄2 292 11 279 111⁄2 2921⁄2 13 1 251⁄2 133⁄4 19 800 363
3
⁄4 756 311⁄8 791 221⁄2 572 147⁄8 378 155⁄8 397 147⁄8 378 155⁄8 397 1 25 1 25 1 253⁄4 19 1100 499
3
⁄8 1051 431⁄2 1105 301⁄2 775 1 25 1 25 1 25 1 25 3300 1497
5
⁄8 397 101⁄4 260 63⁄4 171 71⁄8 181 63⁄4 171 71⁄8 1811⁄2 131⁄2 133⁄8 101⁄4 6 230 104
1
⁄2 902 243⁄4 629 17 432 173⁄4 451 17 432 173⁄4 451 1 25 1 25 1 25 1 25 1720 780
1
⁄2 1029 26 660 1 25 1 25 1 25 1 25 2600 1179
Center
Angle
Angle 150# Angle 300# Angle
Thread
1
⁄2 216 87⁄8 225 81⁄2 216 87⁄8 2251⁄2 131⁄2 131⁄2 131⁄2 13 375 170
Angle 150# Angle 300# Port Size Port Size Port Size Port Size Shipping
Thread
Weights*
*Estimated in lbs.
Operating Pressure
Threaded = 400psi (27.6 bar)
Coated
ASTM B62 Bronze 10" – 16" (250 – 400mm)
(Stainless Steel Optional)
EPDM (optional)
®
Viton
(optional)
150 Flanged = 250psi (17.2 bar)
300 Flanged = 400psi (27.6 bar)
Operating Temperature
Buna-N: 160°F (71°C) Maximum
EPDM: 300°F (140°C) Maximum
®
Viton
: 250°F (121°C) Maximum
F518 / F1518 — Full Port Ductile Iron Dual Chamber Basic Valve
F100 / F1100 — Full Port Ductile Iron Single Chamber Basic Valve
with Mechanical Check Feature
Flow Data - ACV F518 (Globe) / F1518 (Angle)
Valve Size - Inches 2 2-1/2 3 4 6 8 10 12 14 16
Maximum Continuous
Flow Rate Gpm (Water)
Maximum Intermittent
Flow Rate Gpm (Water)
Factor GPM (Globe) 55 75 125 220 460 775 1200 1730 2100 2800
C
V
Factor GPM (Angle) 66 99 170 280 650 1100 1600 2500 3060 4210
C
V
Maximum continuous flow based on velocity of 20 ft. per second.
Maximum intermittent flow based on velocity of 25 ft. per second.
The Cv Factor of a value is the flow rate in US GPM at 60°F that will cause a 1psi drop in pressure.
The factors stated are based upon a fully open valve.
Cv factor can be used in the following equations to determine Flow (Q) and Pressure Drop (∆P):
Q (Flow) = Cv√∆P ∆P (Pressure Drop) = (Q/Cv)
208 300 460 800 1800 3100 4900 7000 8500 11000
260 370 570 1000 2300 3900 6000 8600 10500 14000
2
Estimated
Headloss
100
80
60
40
30
20
10
8
6
4
Pressure Drop (psi)
3
2
Angle
2-1/2
2
4
3
8
6
Globe
2-1/2
2
2 4 6 8 10 20 40 60 80 100 200 500 1000 2000 5000 10000 20000
4
3
8
6
10
12
10
14
12
16
14
16
Flow Rate - Gallons per minute (Water)
Valve Cover Chamber Capacity
Valve Size - Inches 2 2-1/2 3 4 6 8 10 12 14 16
fluid oz. 4 10 10 22 70
U.S. Gal 1-1/4 2-1/2 4 6-1/2 9-1/2
Valve Travel
Valve Size - Inches 2 2-1/2 3 4 6 8 10 12 14 16
Travel - Inches 1/2 5/8 3/4 1 1-1/2 2 2-1/2 3 3-1/2 4
A Watts Water Technologies Company
ES-ACV-F518-F1518 1219 © 2012 Watts
USA: Tel. (713) 943-0688 • (713) 944-9445 • www.watts.com
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